本文实例为大家分享了iOS按比例实现方块图的具体代码，供大家参考，具体内容如下
原理：二分法递归实现，就是每次“对半分”，分到只剩两个
上代码：SZBlockView
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@interface SZBlockView : UIView
@property (nonatomic, strong) NSArray *data;//数据源
@end
#import "SZBlockView.h"
#import "SZItemView.h"
@implementation SZBlockView
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = UIColor.whiteColor;
}
return self;
}
-(void)setData:(NSArray *)data
{
_data = data;
[self removeAll];
for (NSString* value in data) {
[self addSubNode:[value intValue]];
}
[self recalcLayout];
}
-(void)addSubNode:(int)value
{
SZItemView* item = [SZItemView new];
item.value = value;
[self addSubview:item];
}
-(void)removeAll
{
//移除所有子视图
[self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
}
-(bool)isVertical:(double)w Height:(double) h
{
return w / h > 1.618;//黄金比例，可以自己根据需求修改
}
-(void)recalcLayout
{
if (self.subviews.count < 1) return;
[self recalcSquarifiedLayout:0 Finish:self.subviews.count - 1 Area:self.bounds];
}
-(void)recalcSliceLayout:(NSUInteger)nStart Finish:(NSUInteger)nFinish Area:(CGRect)rect IsVertical:(bool) bIsVertical
{
NSAssert(nStart < self.subviews.count, @"nStart >= self.subviews.count");
NSAssert(nFinish < self.subviews.count, @"nFinish >= self.subviews.count");
if (nStart == nFinish)
{
[self.subviews[nStart] setFrame:rect];
return;
}
double dblTotal = [self getChildrenTotal:nStart Finish:nFinish];
double x = rect.origin.x;
double y = rect.origin.y;
if (bIsVertical)
{
for (NSUInteger i = nStart; i <= nFinish; i++)
{
SZItemView* item = self.subviews[i];
double cx = rect.size.width * item.value / dblTotal;
CGRect rectSubNode = item.frame;
rectSubNode = rect;
rectSubNode.origin.x = x;
if (i == nFinish) {
rectSubNode.size.width = cx;
}else{
rectSubNode.size.width = cx-1;
}
item.frame = rectSubNode;
x += cx;
}
} else
{
for (NSUInteger i = nStart; i <= nFinish; i++)
{
SZItemView* item = self.subviews[i];
double cy = rect.size.height * item.value / dblTotal;
CGRect rectSubNode = item.frame;
rectSubNode = rect;
rectSubNode.origin.y = y;
if (i==nFinish) {
rectSubNode.size.height = cy;
}else{
rectSubNode.size.height = cy-1;
}
item.frame = rectSubNode;
y += cy;
}
}
}
-(void)recalcSquarifiedLayout:(NSUInteger)nStart Finish:(NSUInteger)nFinish Area:(CGRect) rect
{
NSAssert(nStart < self.subviews.count, @"nStart >= self.subviews.count");
NSAssert(nFinish < self.subviews.count, @"nFinish >= self.subviews.count");
if (nStart + 2 > nFinish)
{
return [self recalcSliceLayout:nStart Finish:nFinish Area:rect IsVertical:[self isVertical:rect.size.width Height:rect.size.height]];
}
double total = [self getChildrenTotal:nStart Finish:nFinish],total_left = 0.;
for (NSUInteger i = nStart; i <= nFinish; i++)
{
SZItemView* item = self.subviews[i];
double pre_dt = total_left - total / 2;
total_left += item.value;
double dt = total_left - total / 2;
if (dt > 0)
{
if (dt + pre_dt > 0)
{
total_left -= item.value;
i--;
}
if ([self isVertical:rect.size.width Height:rect.size.height])
{
CGRect rectLeft = rect;
rectLeft.size.width = rect.size.width * total_left / total - 1;
[self recalcSquarifiedLayout:nStart Finish:i Area:rectLeft];
CGRect rectRight = rect;
rectRight.origin.x = rectLeft.origin.x + rectLeft.size.width + 1;
rectRight.size.width = rect.size.width - rectLeft.size.width - 1;
[self recalcSquarifiedLayout:i + 1 Finish:nFinish Area:rectRight];
} else
{
CGRect rectTop = rect;
rectTop.size.height = rect.size.height * total_left / total - 1;
[self recalcSquarifiedLayout:nStart Finish:i Area:rectTop];
CGRect rectBottom = rect;
rectBottom.origin.y = rectTop.origin.y + rectTop.size.height + 1;
rectBottom.size.height = rect.size.height - rectTop.size.height - 1;
[self recalcSquarifiedLayout:i + 1 Finish:nFinish Area:rectBottom];
}
return;
}
}
// NSAssert(false, @"unreachable");
}
-(double)getChildrenTotal:(NSUInteger)nStart Finish:(NSUInteger) nFinish
{
double dblTotal = 0.;
for (NSUInteger i = nStart; i <= nFinish; i++)
{
SZItemView* item = self.subviews[i];
dblTotal += item.value;
}
return dblTotal;
}
@end
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SZItemView 里面的每一个小的视图
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@interface SZItemView : UIView
@property (nonatomic, assign) int value;//传入要显示的值
@end
#import "SZItemView.h"
@interface SZItemView ()
@property (nonatomic, strong) UILabel *valueLabel;
@end
@implementation SZItemView
- (instancetype)init
{
self = [super init];
if (self) {
[self setupUI];
}
return self;
}
-(void)setupUI{
UILabel *valueLabel = [[UILabel alloc] initWithFrame:self.frame];
valueLabel.adjustsFontSizeToFitWidth = YES;
self.valueLabel = valueLabel;
valueLabel.textAlignment = NSTextAlignmentCenter;
valueLabel.textColor = UIColor.whiteColor;
[self addSubview:valueLabel];
}
- (void)setValue:(int)value{
_value = value;
self.valueLabel.text = [NSString stringWithFormat:@"%d",value];
self.backgroundColor = UIColor.orangeColor;
}
- (void)layoutSubviews{//如果用masonry布局此方法可不实现
self.valueLabel.frame = self.bounds;
self.valueLabel.adjustsFontSizeToFitWidth = YES;
}
@end
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效果图：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/shuzhi57/article/details/117808107